<!DOCTYPE html>
<html>
<head>
    <script type="text/javascript">
        function runTests()
        {
            if (window.testRunner)
                testRunner.dumpAsText();

            alert(undefined);
            alert(null);
            confirm(undefined);
            confirm(null);
            prompt(undefined);
            prompt(null);

            alert();
            confirm();
            prompt();
        }
    </script>
</head>
<body onload="runTests()">
</body>
</html>
